Towards the southern end of the main area is a soul sphere. To reach it, inside the graveyard, press on the tombstone labelled "CARMEN", then exit the graveyard. Carefully walk across the walkway to reach the soul sphere (if you fall off, you will teleport back into the graveyard). (sector 10)

Two cyberdemons are present inside the normal exit room. If you press on the two green torches in the room, these cyberdemons will be released into the room. Instead of doing this, you can telefrag the cyberdemons by pressing on the portraits in this room. Pressing on the picture of Kristian Aro telefrags the cyberdemon in Secret #2. (sector 187)

Pressing on the picture of Paul Corfiatis telefrags the cyberdemon in Secret #3. (sector 189)

Inside the cargo room near the start is a hole which functions as a teleporter. This takes you to a room with seven empty spaces with names at the top. Another passage is blocked off by seven blocks, and a teleporter in this room takes you back to the cargo room. Exit the cargo room to find the graveyard. There are a total of eight tombstones here. Press on the faces of each and every one of the tombstones (except for the one labelled "CARMEN" which is used for Secret #1) and return to the cargo room. After taking the teleporter back into the silver room, there are voodoo dolls inside each of the formerly empty spaces, and the seven barricades at the far end are gone, allowing access to a secret room. A demon and an imp guard numerous weapons and ammo. (sector 220)

The northeast part of the main area is a part of the building with a large nukage pool. Go around this nukage pool to the other side and head west, past the nukage room. However, go back and drop into the nukage and run into the teleporter when you get the chance. When you teleport, open the satyr door next to you and run through the open wall to the exit door nearby, which takes you to the super secret exit. (sector 257)